منابع مشابه
High-order perturbation expansion of non-Hermitian Floquet theory for multiphoton and above-threshold ionization processes
A high-order perturbation theory is presented for efficient and accurate computation of multiphoton and above-threshold ionization cross sections of atoms and molecules in weak to medium strength laser fields. The procedure is based on a Raleigh-Schrödinger perturbative expansion of the time-independent non-Hermitian Floquet Hamiltonian. The reduced Green function and generalized pseudospectral...
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The potential V (x) = −x4, which is unbounded below on the real line, can give rise to a well-posed bound state problem when x is taken on a contour in the lower-half complex plane. It is then PT symmetric rather than Hermitian. Nonetheless it has been shown numerically to have a real spectrum, and a proof of reality, involving the correspondence between ordinary differential equations and inte...
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ژورنال
عنوان ژورنال: EPL (Europhysics Letters)
سال: 2017
ISSN: 0295-5075,1286-4854
DOI: 10.1209/0295-5075/117/10005